1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Vladimir Medvedkin <medvedkinv@gmail.com>
3 * Copyright(c) 2019 Intel Corporation
16 * All functions in this file may be changed or removed without prior notice.
18 * FIB (Forwarding information base) implementation
19 * for IPv4 Longest Prefix Match
22 #include <rte_compat.h>
31 /** Maximum depth value possible for IPv4 FIB. */
32 #define RTE_FIB_MAXDEPTH 32
34 /** Type of FIB struct */
36 RTE_FIB_DUMMY, /**< RIB tree based FIB */
37 RTE_FIB_DIR24_8 /**< DIR24_8 based FIB */
40 /** Modify FIB function */
41 typedef int (*rte_fib_modify_fn_t)(struct rte_fib *fib, uint32_t ip,
42 uint8_t depth, uint64_t next_hop, int op);
43 /** FIB bulk lookup function */
44 typedef void (*rte_fib_lookup_fn_t)(void *fib, const uint32_t *ips,
45 uint64_t *next_hops, const unsigned int n);
52 /** Size of nexthop (1 << nh_sz) bits for DIR24_8 based FIB */
53 enum rte_fib_dir24_8_nh_sz {
60 /** FIB configuration structure */
62 enum rte_fib_type type; /**< Type of FIB struct */
63 /** Default value returned on lookup if there is no route */
68 enum rte_fib_dir24_8_nh_sz nh_sz;
80 * NUMA socket ID for FIB table memory allocation
82 * Structure containing the configuration
84 * Handle to the FIB object on success
85 * NULL otherwise with rte_errno set to an appropriate values.
89 rte_fib_create(const char *name, int socket_id, struct rte_fib_conf *conf);
92 * Find an existing FIB object and return a pointer to it.
95 * Name of the fib object as passed to rte_fib_create()
97 * Pointer to fib object or NULL if object not found with rte_errno
98 * set appropriately. Possible rte_errno values include:
99 * - ENOENT - required entry not available to return.
103 rte_fib_find_existing(const char *name);
106 * Free an FIB object.
115 rte_fib_free(struct rte_fib *fib);
118 * Add a route to the FIB.
123 * IPv4 prefix address to be added to the FIB
127 * Next hop to be added to the FIB
129 * 0 on success, negative value otherwise
133 rte_fib_add(struct rte_fib *fib, uint32_t ip, uint8_t depth, uint64_t next_hop);
136 * Delete a rule from the FIB.
141 * IPv4 prefix address to be deleted from the FIB
145 * 0 on success, negative value otherwise
149 rte_fib_delete(struct rte_fib *fib, uint32_t ip, uint8_t depth);
152 * Lookup multiple IP addresses in the FIB.
157 * Array of IPs to be looked up in the FIB
159 * Next hop of the most specific rule found for IP.
160 * This is an array of eight byte values.
161 * If the lookup for the given IP failed, then corresponding element would
162 * contain default nexthop value configured for a FIB.
164 * Number of elements in ips (and next_hops) array to lookup.
166 * -EINVAL for incorrect arguments, otherwise 0
170 rte_fib_lookup_bulk(struct rte_fib *fib, uint32_t *ips,
171 uint64_t *next_hops, int n);
173 * Get pointer to the dataplane specific struct
178 * Pointer on the dataplane struct on success
183 rte_fib_get_dp(struct rte_fib *fib);
186 * Get pointer to the RIB
191 * Pointer on the RIB on success
196 rte_fib_get_rib(struct rte_fib *fib);
202 #endif /* _RTE_FIB_H_ */